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Unit 1 of 2

Chemical Substances, Reactions and Essential Resources

WJEC GCSE Science (Double Award) — Chemistry · 46 lessons · 34 quizzes

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1.1

Unit 1 overview: Chemical Substances, Reactions and Essential Resources20 min

1.1.1

Elements and Compounds20 min

1.1.2

Chemical Symbols and Formulae20 min

1.1.3

Relative Atomic Mass and Relative Molecular Mass20 min

1.1.4

Percentage Composition20 min

1.1.5

Separating Mixtures20 min

1.1.6

Conservation of Mass20 min

1.1.7

Evidence of a Chemical Reaction20 min

1.1.8

Chemical Equations20 min

1.1.9

Percentage Yield20 min

1.1.10

Reacting Masses20 min

1.1.11

The Avogadro Constant and the Mole20 min

1.2.1

Atomic Structure20 min

1.2.2

Atomic Number, Mass Number and Isotopes20 min

1.2.3

The Periodic Table20 min

1.2.4

Electronic Structure20 min

1.2.5

Trends in the Periodic Table20 min

1.2.6

Reactions of Alkali Metals20 min

1.2.7

Testing for Hydrogen Gas20 min

1.2.8

Reactions of Halogens20 min

1.2.9

Group 0 Gases20 min

1.2.10

Testing Cations and Anions20 min

1.3.1

Composition of Water20 min

1.3.2

Sustainable Water Supply20 min

1.3.3

Water Treatment20 min

1.3.4

Fluoridation of Water20 min

1.3.5

Desalination20 min

1.3.6

Distillation20 min

1.3.7

Solubility Curves20 min

1.3.8

Hard Water20 min

1.3.9

Water Softening20 min

1.3.10

Benefits and Drawbacks of Hard Water20 min

1.3.11

Determining Hardness in Water20 min

1.4.1

Structure of the Earth20 min

1.4.2

Plate Tectonics20 min

1.4.3

Plate Boundaries20 min

1.4.4

The Atmosphere20 min

1.4.5

Carbon Dioxide and Sulfur Dioxide Emissions20 min

1.4.6

Global Warming and Acid Rain20 min

1.4.7

Testing for Oxygen and Carbon Dioxide20 min

1.5.1

Determining the Rate of Reaction20 min

1.5.2

Factors Affecting Rates20 min

1.5.3

Hydrochloric Acid and Sodium Thiosulfate20 min

1.5.4

Particle Theory20 min

1.5.5

Catalysts20 min

1.5.6

Rate of Reaction Using Gas Collection20 min

Practice for this unit

1.1.1 Elements and Compounds - MCQ practice (4 questions)

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1.1.2 Chemical Symbols and Formulae - MCQ practice (19 questions)

Marked questions with instant feedback and a full review.

1.1.3 Relative Atomic Mass and Relative Molecular Mass - MCQ practice (5 questions)

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1.1.4 Percentage Composition - MCQ practice (4 questions)

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1.1.5 Separating Mixtures - MCQ practice (12 questions)

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1.1.6 Conservation of Mass - MCQ practice (8 questions)

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1.1.8 Chemical Equations - MCQ practice (25 questions)

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1.1.9 Percentage Yield - MCQ practice (8 questions)

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1.1.10 Reacting Masses - MCQ practice (7 questions)

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1.1.11 The Avogadro Constant and the Mole - MCQ practice (13 questions)

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1.2.1 Atomic Structure - MCQ practice (25 questions)

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1.2.2 Atomic Number, Mass Number and Isotopes - MCQ practice (39 questions)

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1.2.3 The Periodic Table - MCQ practice (14 questions)

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1.2.4 Electronic Structure - MCQ practice (1 questions)

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1.2.5 Trends in the Periodic Table - MCQ practice (16 questions)

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1.2.6 Reactions of Alkali Metals - MCQ practice (19 questions)

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1.2.7 Testing for Hydrogen Gas - MCQ practice (1 questions)

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1.2.8 Reactions of Halogens - MCQ practice (11 questions)

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1.2.9 Group 0 Gases - MCQ practice (33 questions)

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1.2.10 Testing Cations and Anions - MCQ practice (12 questions)

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1.3.2 Sustainable Water Supply - MCQ practice (8 questions)

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1.3.3 Water Treatment - MCQ practice (8 questions)

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1.3.5 Desalination - MCQ practice (7 questions)

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1.3.6 Distillation - MCQ practice (12 questions)

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1.4.4 The Atmosphere - MCQ practice (19 questions)

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1.4.5 Carbon Dioxide and Sulfur Dioxide Emissions - MCQ practice (11 questions)

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1.4.6 Global Warming and Acid Rain - MCQ practice (10 questions)

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1.4.7 Testing for Oxygen and Carbon Dioxide - MCQ practice (1 questions)

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1.5.1 Determining the Rate of Reaction - MCQ practice (2 questions)

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1.5.2 Factors Affecting Rates - MCQ practice (5 questions)

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1.5.3 Hydrochloric Acid and Sodium Thiosulfate - MCQ practice (2 questions)

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1.5.4 Particle Theory - MCQ practice (30 questions)

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1.5.5 Catalysts - MCQ practice (4 questions)

Marked questions with instant feedback and a full review.

1.5.6 Rate of Reaction Using Gas Collection - MCQ practice (1 questions)

Marked questions with instant feedback and a full review.